257090850 has 72 divisors (see below), whose sum is σ = 693119700. Its totient is φ = 68319360.

The previous prime is 257090831. The next prime is 257090857. The reversal of 257090850 is 58090752.

257090850 is a `hidden beast` number, since 2 + 570 + 9 + 0 + 85 + 0 = 666.

257090850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 50680161 + 206410689 = 7119^2 + 14367^2 .

It is not an unprimeable number, because it can be changed into a prime (257090857) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 156232 + ... + 157868.

Almost surely, 2^257090850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257090850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346559850).

257090850 is an abundant number, since it is smaller than the sum of its proper divisors (436028850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257090850 is a wasteful number, since it uses less digits than its factorization.

257090850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 257090850 is about 16034.0528251593. The cubic root of 257090850 is about 635.8610263572.

The spelling of 257090850 in words is "two hundred fifty-seven million, ninety thousand, eight hundred fifty".